/**
 * @file   string_util_detail.hpp
 * @author wolfhead <wolfhead@wolfhead-laptop>
 * @date   Thu Aug 18 16:39:13 2011
 * 
 * @brief  
 * 
 * 
 */
#ifndef ACAPELLA_STRING_STRING_UTIL_DETAIL_H
#define ACAPELLA_STRING_STRING_UTIL_DETAIL_H

#include <stdlib.h>
#include <memory.h>
#include "../acapella.h"

namespace acapella
{
namespace __detail__
{


//////////////////////////////////////////////////////////////////////
// function maps
#ifdef ACAPELLA_WINDOWS
#	define __strtol		strtol
#	define __strtoul	strtoul
#	define __strtoll    _strtoi64
#	define __strtoull	_strtoui64
#	define __strtof		strtod
#	define __strtod		strtod
#	define __strtold	strtod
#endif

#ifdef ACAPELLA_LINUX
#	define __strtol		strtol
#	define __strtoul	strtoul
#	define __strtoll	strtoll
#	define __strtoull	strtoull
#	define __strtof		strtof
#	define __strtod		strtod
#	define __strtold	strtold
#endif



//////////////////////////////////////////////////////////////////////
// __CharSet
// this __CharSet represent a set of chars
// which is used to determine whether a char is in
// the set
struct STRING_CHAR_SET{};
struct BITMAP_CHAR_SET{};

template<typename Type = STRING_CHAR_SET> 
class __CharSet{};

typedef __CharSet<STRING_CHAR_SET> StringCharSet;
typedef __CharSet<BITMAP_CHAR_SET> BitmapCharSet;

template<>
class __CharSet<STRING_CHAR_SET>
{
public:
    __CharSet(const char * pCharset)
        :charset_(pCharset)
    {
    }

    __CharSet(const std::string& charset)
        :charset_(charset)
    {
    }


    bool contain(char c) const
    {
        return charset_.find(c) != std::string::npos;
    }

private:
    std::string charset_;
};

/**
 * A CharSet implemented with bitmap
 * faster when used many times
 */
template<>
class __CharSet<BITMAP_CHAR_SET>
{
public:
    enum
    {
        MASK_SIZE = 256 // all ascii
    };

    __CharSet(const char * pCharset)
    {
        _createBitmap((unsigned char*)pCharset);
    }

    __CharSet(const std::string& charset)
    {
        _createBitmap((unsigned char*)charset.c_str());
    }


    bool contain(unsigned char c) const
    {
        return bitmap_[int(c)];
    }

private:
    void _createBitmap(const unsigned char *pCharset)
    {
        memset(bitmap_, 0, MASK_SIZE);
        
        for (; *pCharset; ++pCharset)
        {
            bitmap_[int(*pCharset)] = 1;
        }
    }

    char bitmap_[MASK_SIZE];
};


//////////////////////////////////////////////////////////////////////
// _StringToValueImpl


template <typename T>
struct _StringToValueImpl{};

#define _BUILD_STRING_TO_VALUE_IMPL_(type)                  \
    template<>                                              \
    struct _StringToValueImpl<type>                         \
    {                                                       \
        static type toValue(                                \
            const char * str,                               \
            type default_value)                             \
        {                                                   \
            return (type)(_StringToValueImpl<long>          \
                          ::toValue(str, default_value));   \
        }                                                   \
    };                                                      \
                                                            \
    template<>                                              \
    struct _StringToValueImpl<unsigned type>                \
    {                                                       \
        static unsigned type toValue(                       \
            const char * str,                               \
            unsigned type default_value)                    \
        {                                                   \
            return (unsigned type)(                         \
                _StringToValueImpl<unsigned long>           \
                ::toValue(str, default_value));             \
        }                                                   \
    };                                                      \


template<>
struct _StringToValueImpl<long>
{
    static long toValue(const char * str, long default_value)
    {
        char * end = NULL;
        long n = __strtol(str, &end, 0);
        return end == NULL ? default_value : n;
    }
};

template<>
struct _StringToValueImpl<unsigned long>
{
    static unsigned long toValue(const char * str, unsigned long default_value)
    {
        char * end = NULL;
        long n = ::__strtoul(str, &end, 0);
        return end == NULL ? default_value : n;
    }
};


template<>
struct _StringToValueImpl<long long>
{
    static long long toValue(const char * str, long long default_value)
    {
        char * end = NULL;
        long long n = __strtoll(str, &end, 0);
        return end == NULL ? default_value : n;
    }
};

template<>
struct _StringToValueImpl<unsigned long long>
{
    static unsigned long long toValue(const char * str, unsigned long long default_value)
    {
        char * end = NULL;
        long long n = __strtoull(str, &end, 0);
        return end == NULL ? default_value : n;     
    }
};

template<>
struct _StringToValueImpl<float>
{
    static float toValue(const char * str, float default_value)
    {
        char * end = NULL;
        float n = __strtof(str, &end);
        return end == NULL ? default_value : n;           
    }
};



template<>
struct _StringToValueImpl<double>
{
    static double toValue(const char * str, double default_value)
    {
        char * end = NULL;
        double n = __strtod(str, &end);
        return end == NULL ? default_value : n;           
    }
};


template<>
struct _StringToValueImpl<long double>
{
    static long double toValue(const char * str, long double default_value)
    {
        char * end = NULL;
        long double n = __strtold(str, &end);
        return end == NULL ? default_value : n;           
    }
};

_BUILD_STRING_TO_VALUE_IMPL_(char);
_BUILD_STRING_TO_VALUE_IMPL_(short);
_BUILD_STRING_TO_VALUE_IMPL_(int);


#undef __strtol
#undef __strtoul
#undef __strtoll
#undef __strtoull
#undef __strtof
#undef __strtod
#undef __strtodl


struct __ConvertImpl
{

    static inline void Bin2Hex(
        unsigned char bin, 
        unsigned char& high, 
        unsigned char& low)
    {
        static const char map[] = "0123456789ABCDEF";
        high = map[bin >> 4];
        low = map[bin & 0x0F];
    }

    static inline void Bin2Oct(
        unsigned char bin, 
        unsigned char& c1, 
        unsigned char& c2, 
        unsigned char& c3)
    {
        static const char map[] = "01234567";
        c1 = map[bin >> 6];
        c2 = map[bin >> 3 & 0x07];
        c3 = map[bin & 0x07];
    }

    static inline void Hex2Bin(unsigned char high, unsigned char low, unsigned char& bin)
    {
#ifdef  _0_
#error  "_0_ already defined"
#else
#define _0_ (0)

        static const unsigned char map[256] = {
            //       0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F
            /* 0 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 1 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 2 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 3 */  0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 4 */ _0_, 10, 11, 12, 13, 14, 15,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 5 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 6 */ _0_, 10, 11, 12, 13, 14, 15,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 7 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 8 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 9 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* A */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* B */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* C */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* D */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* E */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* F */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_
        };
#undef _0_
#endif // #ifdef  _0_

        bin = map[high] << 4 | map[low];
    }


    static inline void Oct2Bin(
        unsigned char c1, 
        unsigned char c2, 
        unsigned char c3, 
        unsigned char& bin)
    {
#ifdef  _0_
#error  "_0_ already defined"
#else
#define _0_ (0)

        static const unsigned char map[256] = {
            //       0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F
            /* 0 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 1 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 2 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 3 */  0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 ,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 4 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 5 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 6 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 7 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 8 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* 9 */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* A */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* B */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* C */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* D */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* E */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,
            /* F */ _0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_,_0_
        };
#undef _0_
#endif //#ifdef  _0_

        bin = map[c1] << 6 | map[c2] << 3 | map[c3];
    }


    static inline void ToUpper(
        unsigned char c, 
        unsigned char& t)
    {

        static const unsigned char map[256] = {
            //      0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F
            /* 0 */ 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
            /* 1 */ 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
            /* 2 */ 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
            /* 3 */ 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
            /* 4 */ 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,
            /* 5 */ 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,
            /* 6 */ 0x60,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,
            /* 7 */ 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x7B,0x7C,0x7D,0x7E,0x7F,
            /* 8 */ 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
            /* 9 */ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
            /* A */ 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
            /* B */ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
            /* C */ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
            /* D */ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
            /* E */ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
            /* F */ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF
        };

        t = map[c];
    }


    static inline void ToLower(
        unsigned char c, 
        unsigned char& t)
    {

        static const unsigned char map[256] = {
            //      0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F
            /* 0 */ 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
            /* 1 */ 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
            /* 2 */ 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
            /* 3 */ 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
            /* 4 */ 0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
            /* 5 */ 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x5B,0x5C,0x5D,0x5E,0x5F,
            /* 6 */ 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
            /* 7 */ 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,
            /* 8 */ 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
            /* 9 */ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
            /* A */ 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
            /* B */ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
            /* C */ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
            /* D */ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
            /* E */ 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
            /* F */ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF
        };

        t = map[c];
    }
};


}//namespace __detail__
}//namespace acapella


#endif
